About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
|
Symposium
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Additive Manufacturing Modeling, Simulation and Machine Learning
|
Presentation Title |
Controlling Bubble Transport with External Magnetic Fields in Additive Manufacturing |
Author(s) |
Ivars Krastins, Xianqiang Fan, Harry E Chapman, Catherine Tonry, Peter Soar, Koulis Pericleous, Peter D Lee, Andrew Kao |
On-Site Speaker (Planned) |
Ivars Krastins |
Abstract Scope |
Relatively low external magnetic fields, B<1T (within the range of permanent magnets) have been shown to significantly reduce the formation of porosity during additive manufacturing. There are strong indications that this is due to the introduction of a secondary Thermoelectric Magnetohydrodynamic (TEMHD) flow that transports bubbles to the surface. A similar effect is also seen in the segregation of tracer particles when a magnetic field is applied.
TESA (Thermoelectric Solidification Algorithm), a numerical model that couples the strong time dependent interaction of thermodynamics (heat and mass transport, melting, solidification) and hydrodynamics (Marangoni, buoyancy and TEMHD driven flows) with bubble (particle) transport is used to understand the underlying mechanisms. TESA consists of several methods/solvers including enthalpy based for solidification, lattice Boltzmann for fluid flow and Lagrangian based particle tracking.
The model provides insights into how the magnetic field can be used as an independent control to mitigate porosity defects. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Other, Other |